Home / 27,856.95-38,442.70-15,920.69

Finding the Fourth Proportional to 27,856.95, 38,442.70 and 15,920.69

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Solution

The fourth proportional to 27,856.95, 38,442.70 and 15,920.69 is: 21,970.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,856.95 : 38,442.70 = 15,920.69 : x
  2. Step 2: Convert to fraction form
    27,856.95/38,442.70 = 15,920.69/x
  3. Step 3: Cross multiply
    27,856.95x = 38,442.70 × 15,920.69
  4. Step 4: Simplify right side
    27,856.95x = 612,034,137.15
  5. Step 5: Solve for x
    x = 612,034,137.15/27,856.95
  6. Step 6: Final answer
    x = 21,970.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.